Back to EveryPatent.com
United States Patent | 5,768,682 |
Peyrovian | June 16, 1998 |
Bandwidth is increased and noise may be reduced in a shared hybrid fiber-coax transmission system (10) by digitally modulating upstream information onto a high frequency band (e.g., 750-1000 MHz) and thereafter digitally regenerating the high frequency upstream information.
Inventors: | Peyrovian; M. Javad (Aberdeen, NJ) |
Assignee: | AT&T Corp (Middletown, NJ) |
Appl. No.: | 687818 |
Filed: | July 26, 1996 |
Current U.S. Class: | 725/104; 725/128 |
Intern'l Class: | H04N 007/173 |
Field of Search: | 348/6,7,8,9,10,11,12,13,14,15,16,17,18 455/3.1,4.1,4.2,5.1,6.1,6.2,6.3 |
3835393 | Sep., 1974 | Marron | 348/12. |
4709266 | Nov., 1987 | Hanas et al. | 380/20. |
5130664 | Jul., 1992 | Pavlic et al. | 348/6. |
5408259 | Apr., 1995 | Warwick | 348/12. |
5499047 | Mar., 1996 | Terry et al. | 348/12. |
5528582 | Jun., 1996 | Bodeep et al. | 348/13. |
5557319 | Sep., 1996 | Gurusami et al. | 348/11. |
5561404 | Oct., 1996 | Ross | 375/214. |